Service Manual

GSM-204-523
Replacing a cabinet temperature sensor
31st Oct 01
Maintenance Information: Horizon macro outdoor
68P02902W04-A
CONTROLLED INTRODUCTION
Maint. 3–13
Replacing a cabinet temperature sensor
Overview of
main cage
temperature
sensor FRUs
Three temperature sensors plug into the backplane from the front above the
CTUs. Each one can be removed separately, and a replacement inserted.
Replaceing a
main cage
temperature
sensor
WARNING Severe burns may result if CTU power is ON when RF
cables are disconnected.
The procedure for replacing a main cage temperature sensor is as follows:
1. Turn cabinet PSMs off, to ensure that the CTU power is OFF, before
disconnecting RF cables.
2. Remove the CTUs (see Replacing a CTU).
3. Identify the faulty temperature sensor.
4. Unplug the faulty temperature sensor.
5. Insert the replacement temperature sensor.
6. Install the CTUs (see Replacing a CTU).
The temperature sensors should now be operational.